Fadel Kadim, Shahad, and Heiyam Najy Hady. “Measurement Radon Gas Concentration in Selected Soil Samples of The of Al-Nada District in Najaf”. International Journal of Engineering & Technology 7, no. 4.36 (December 9, 2018): 678–680. Accessed November 22, 2024. https://sciencepubco.com/index.php/ijet/article/view/24222.